DIRECT DETERMINATION OF THE COMPLETE FUSION CROSS SECTIONS FROM THE FISSION FRAGMENT ANGULAR DISTRIBUTION

LIU GUO-XING; CHEN KE-LIANG; MA HONG-FAN; WANG SU-FANG; CAI WEI

Chinese Physics C> 1982, Vol. 6> Issue(6) : 737-742

DIRECT DETERMINATION OF THE COMPLETE FUSION CROSS SECTIONS FROM THE FISSION FRAGMENT ANGULAR DISTRIBUTION

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Abstract：
We have measured the angular distributions of fission fragnents for a series ofcompound nuclei formed in the bombardment of ¹⁸¹Ta, W, Re, Pt, ¹⁹⁷Au, Pb and ²⁰⁹Biby 72.7, 69.6, 67.4, 65.4, 63.4 and 61.4 MeV ¹²C ions with mica track detectors. Thecritical angular momentum l_cr. can be determined directly from the statistical analysisof the fission fragment angular distribution corresponding to the fission events withfull momentum transfer. The complete fusion cross section σ_fu were calculated on thebasis of the sharp cut-off model. The results for l_cr obtained by this method were com-pared with those predicted by R. Bass model. The published data on fission fragmentangular distributions of ¹⁴N+Pb and ¹²C+²³⁸U reactions were also analyzed by thismethod. The values of σ_fu are found to be in good agreement with the direct comple-te fusion cross section measurements.

References

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LIU GUO-XING, CHEN KE-LIANG, MA HONG-FAN, WANG SU-FANG and CAI WEI. DIRECT DETERMINATION OF THE COMPLETE FUSION CROSS SECTIONS FROM THE FISSION FRAGMENT ANGULAR DISTRIBUTION[J]. Chinese Physics C, 1982, 6(6): 737-742.

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Received: 1981-09-18
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

DIRECT DETERMINATION OF THE COMPLETE FUSION CROSS SECTIONS FROM THE FISSION FRAGMENT ANGULAR DISTRIBUTION

Received Date: 1981-09-18

Accepted Date: 1900-01-01

Available Online: 1982-12-05

Abstract: We have measured the angular distributions of fission fragnents for a series ofcompound nuclei formed in the bombardment of ¹⁸¹Ta, W, Re, Pt, ¹⁹⁷Au, Pb and ²⁰⁹Biby 72.7, 69.6, 67.4, 65.4, 63.4 and 61.4 MeV ¹²C ions with mica track detectors. Thecritical angular momentum l_cr. can be determined directly from the statistical analysisof the fission fragment angular distribution corresponding to the fission events withfull momentum transfer. The complete fusion cross section σ_fu were calculated on thebasis of the sharp cut-off model. The results for l_cr obtained by this method were com-pared with those predicted by R. Bass model. The published data on fission fragmentangular distributions of ¹⁴N+Pb and ¹²C+²³⁸U reactions were also analyzed by thismethod. The values of σ_fu are found to be in good agreement with the direct comple-te fusion cross section measurements.

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DIRECT DETERMINATION OF THE COMPLETE FUSION CROSS SECTIONS FROM THE FISSION FRAGMENT ANGULAR DISTRIBUTION

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